feat: Add db voice session tracking

plugin/data.py

@@ -12,5 +12,18 @@ class VoiceLogGuild(RowModel):
     _timestamp = Timestamp()
 
 
+class VoiceLogSession(RowModel):
+    _tablename_ = "voicelog_sessions"
+    _cache_ = {}
+
+    sessionid = Integer(primary=True)
+    guildid = Integer()
+    userid = Integer()
+    channelid = Integer()
+    joined_at = Timestamp()
+    duration = Integer()
+
+
 class VoiceLogData(Registry):
     voicelog_guilds = VoiceLogGuild.table
+    voicelog_sessions = VoiceLogSession.table